diff --git a/include/rosa/support/csv/CSVReader.hpp b/include/rosa/support/csv/CSVReader.hpp
index c5678ef..3b6ed7b 100755
--- a/include/rosa/support/csv/CSVReader.hpp
+++ b/include/rosa/support/csv/CSVReader.hpp
@@ -1,484 +1,484 @@
 //===-- rosa/support/csv/CSVReader.hpp --------------------------*- C++ -*-===//
 //
 //                                 The RoSA Framework
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file rosa/support/csv/CSVReader.hpp
 ///
 /// \authors David Juhasz (david.juhasz@tuwien.ac.at), Edwin Willegger
 /// (edwin.willegger@tuwien.ac.at)
 ///
 /// \date 2017-2019
 ///
 /// \brief Facitilities to read CSV files.
 ///
 /// \note The implementation is based on the solution at
 /// https://stackoverflow.com/a/1120224
 ///
 //===----------------------------------------------------------------------===//
 
 #ifndef ROSA_SUPPORT_CSV_CSVREADER_HPP
 #define ROSA_SUPPORT_CSV_CSVREADER_HPP
 
 #include "rosa/support/debug.hpp"
 #include "rosa/support/sequence.hpp"
 
 #include <algorithm>
 #include <istream>
 #include <map>
 #include <set>
 #include <sstream>
 #include <vector>
 
 namespace rosa {
 namespace csv {
 
 /// Indicating it the CSV file contains any header or not
 enum class HeaderInformation { HasHeader, HasNoHeader };
 
 /// Anonymous namespace providing implementation details for
 /// \c rosa::csv::CSVIterator, consider it private.
 namespace {
 
 /// Provides facility for parsing one value from a string.
 ///
 /// \tparam T type of value to parse
 /// \tparam IsSignedInt if \p T is a signed integral type, always use default
 /// \tparam IsUnsignedInt if \p T is an unsigned integral type, always use
 /// default
 /// \tparam IsFloat if \p T is a floating-point type, always use default
 /// \tparam IsString if \p T is \c std::string, always use default
 ///
 /// \note Specializations of this struct are provided for arithmentic types
 /// and \c std::string.
 template <typename T,
           bool IsSignedInt =
               (std::is_integral<T>::value && std::is_signed<T>::value),
           bool IsUnsignedInt =
               (std::is_integral<T>::value && std::is_unsigned<T>::value),
           bool IsFloat = std::is_floating_point<T>::value,
           bool IsString = std::is_same<T, std::string>::value>
 struct ValueParser {
 
   ///
   ///
   /// \param Cell the \c std::string to parse
   ///
   /// \return the parsed value
   ///
   /// \note The function silently fails if cannot parse \p Cell for type \p T.
   static T parse(const std::string &Cell) noexcept;
 };
 
 template <typename T> struct ValueParser<T, true, false, false, false> {
   STATIC_ASSERT((std::is_integral<T>::value && std::is_signed<T>::value),
                 "wrong type"); // Sanity check.
   static T parse(const std::string &Cell) noexcept {
     return static_cast<T>(std::stoll(Cell));
   }
 };
 
 template <typename T> struct ValueParser<T, false, true, false, false> {
   STATIC_ASSERT((std::is_integral<T>::value && std::is_unsigned<T>::value),
                 "wrong type"); // Sanity check.
   static T parse(const std::string &Cell) noexcept {
     return static_cast<T>(std::stoull(Cell));
   }
 };
 
 template <typename T> struct ValueParser<T, false, false, true, false> {
   STATIC_ASSERT((std::is_floating_point<T>::value),
                 "wrong type"); // Sanity check.
   static T parse(const std::string &Cell) noexcept {
     return static_cast<T>(std::stold(Cell));
   }
 };
 
 template <typename T> struct ValueParser<T, false, false, false, true> {
   STATIC_ASSERT((std::is_same<T, std::string>::value),
                 "wrong type"); // Sanity check.
   static T parse(const std::string &Cell) noexcept { return Cell; }
 };
 
 /// Parses and stores entries from a row of CSV data.
 ///
 /// \tparam Ts types of values to parse and store, i.e. entries in the row
 ///
 /// \note The implementation relies on \c rosa::csv::CSVRowParser, which is
 /// implemented only for `arithmetic` types -- signed and unsigned integral
 /// and floating-point types -- and for \c std::string. Those are the valid
 /// values for \p Ts.
 template <typename... Ts> class CSVRow {
 private:
   /// Parses a given row of CSV data into \c CSVRow::Data.
   ///
   /// \ CSVRow::Data is filled with values parsed from \p LineStream. Entries
   /// in the line are to be separated by commas, the character `,`.
   ///
   /// \note Parsed values are silently converted to types \p Ts.
   ///
   /// \note Parsing silently fails if values do not match \p Ts.
   ///
   /// \tparam S0 indices to access tuple elements.
   ///
   /// \param [in,out] LineStream the line to parse
   ///
   /// \note The last argument is used only to get \p S0, the actual value of
   /// the parameter is ignored.
   template <size_t... S0>
-  void parseRow(std::stringstream &LineStream, char Delimeter, Seq<S0...>) {
+  void parseRow(std::stringstream &LineStream, char Delimiter, Seq<S0...>) {
     STATIC_ASSERT(sizeof...(Ts) == sizeof...(S0),
                   "Not matching template arguments.");
     std::string Cell;
     // Get fields and parse the values into the proper element of the tuple
     // one by one in a fold expression.
-    ((std::getline(LineStream, Cell, Delimeter),
+    ((std::getline(LineStream, Cell, Delimiter),
       std::get<S0>(Data) = ValueParser<Ts>::parse(Cell)),
      ...);
   }
 
 public:
   /// Constructor with all possible parameters
   ///
   ///  The function creates an instance of an CSVRow object and sets the
   ///  attributes of the
   ///  object to the values of the parameters.
   ///
   /// \param SkipRows the number of data rows to skip, not taking header into
   /// account.
   /// \param HeaderInfo is the first line of the file a header row or not.
-  /// \param Delimeter to seperate between the data entries within one row.
+  /// \param Delimiter to seperate between the data entries within one row.
   CSVRow(const size_t SkipRows = 0,
          const HeaderInformation HeaderInfo = HeaderInformation::HasHeader,
-         const char Delimeter = ',')
-      : SkipRows(SkipRows), HeaderInfo(HeaderInfo), Delimeter(Delimeter),
+         const char Delimiter = ',')
+      : SkipRows(SkipRows), HeaderInfo(HeaderInfo), Delimiter(Delimiter),
         RowNumber(0), IsHeaderRead(false) {}
 
   /// Parses and stores one row of CSV data.
   ///
   /// The function reads one line from \p Str and parses it into
   /// \c rosa::csv::CSVRow::Data using \c rosa::csv::CSVRowParser.
   ///
   /// \param [in,out] Str input stream of a CSV file
   void readNextRow(std::istream &Str) noexcept {
     std::string Line;
 
     std::getline(Str, Line);
 
     if (Line.size() > 0) {
       std::stringstream LineStream(Line);
-      parseRow(LineStream, Delimeter, seq_t<sizeof...(Ts)>());
+      parseRow(LineStream, Delimiter, seq_t<sizeof...(Ts)>());
 
       RowNumber = RowNumber + 1;
     }
   }
 
   /// Read header row and stores it as \p std::string.
   ///
   /// The function reads the first line of the csv file and stores the entries
   /// in a vector.
   ///
   /// \param [in,out] Str input stream of a CSV file
   void readHeader(std::istream &Str) noexcept {
     std::string Line;
     std::getline(Str, Line);
     std::stringstream LineStream(Line);
     std::string Value;
 
-    while (getline(LineStream, Value, Delimeter)) {
+    while (getline(LineStream, Value, Delimiter)) {
       Header.push_back(Value);
     }
 
     IsHeaderRead = true;
   }
 
   /// The number of rows to skip once.
   ///
   /// This function returns the number of data rows to skip
   /// at the beginning of the file.
   ///
   /// \return The number of rows to skip at the beginning of a csv file.
   inline size_t SkipNumRows() const noexcept { return this->SkipRows; }
 
   /// The current row number within the csv file.
   ///
   /// This function returns the current row number. The header
   /// row is not counted as a row.
   ///
   /// \returns the current row number within the csv file.
   inline size_t CurRow() const noexcept { return this->RowNumber; }
 
   /// Indiciates if the header was already read.
   ///
   /// This function returns true, if the header of a csv file which contains
   /// a header file is already read.
   /// The user has to pass in the attribute HeaderInfo the information if the
   /// file has in the first row the header row or not.
   ///
   /// \return if the header of a file is already read.
   inline bool IsHeaderReadDone() const noexcept { return this->IsHeaderRead; }
 
   /// Indicates if the file contains a header row in the first row.
   ///
   /// This function returns if the file contains a header row.
   /// The information if the file contains a header row or not, has to be passed
   /// by the user.
   /// The standard value is HeaderInformation::HasHeader
   ///
   /// \return if the csv file contains a header row in the first line of the
   /// file.
   inline HeaderInformation HasFileHeader() const noexcept {
     return this->HeaderInfo;
   }
 
   /// Set the number of rows to skip.
   ///
   /// This function sets the number of rows to skip at the beginning of
   /// the reading of the file.
   ///
-  /// \param SkipRows the number of rows you want to skip at the beginning of
+  /// \param _SkipRows the number of rows you want to skip at the beginning of
   /// the file.
   // NOTE (Maxi): I had to change "SkipRows" to "_SkipRows" because otherwise:
   // "warning: C4458: declaration of 'SkipRows' hides class member"
   inline void SetSkipRows(const size_t _SkipRows) noexcept {
     this->SkipRows = _SkipRows;
   }
 
   /// Is the first row a header row or not.
   ///
   /// This function sets the information, if the first row of the csv file
   /// is a header line or not.
   ///
-  /// \param HeaderInfo if the first row is a header row or not.
+  /// \param _HeaderInfo if the first row is a header row or not.
   // NOTE (Maxi): I had to change "HeaderInfo" to "_HeaderInfo", otherwise:
   // "warning: C4458: declaration of 'HeaderInfo' hides class member"
   inline void SetHeaderInfo(const HeaderInformation _HeaderInfo) noexcept {
     this->HeaderInfo = _HeaderInfo;
   }
 
   /// Set the seperator between data entries.
   ///
   /// This funcction sets the separator between the data entries of the csv
   /// file.
   ///
-  /// \param Delimeter the character that separates the data values.
-  // NOTE (Maxi): I had to change "Delimeter" to "_Delimeter" because otherwise:
-  // "warning: C4458: declaration of 'Delimeter' hides class member"
-  inline void SetDelimeter(char _Delimeter) { this->Delimeter = _Delimeter; }
+  /// \param _Delimiter the character that separates the data values.
+  // NOTE (Maxi): I had to change "Delimiter" to "_Delimiter" because otherwise:
+  // "warning: C4458: declaration of 'Delimiter' hides class member"
+  inline void SetDelimiter(char _Delimiter) { this->Delimiter = _Delimiter; }
 
   /// Gives a constant references for the \c std::tuple containing the values
   /// read by \p this object.
   ///
   /// \return \c CSVRow::Data
   const std::tuple<Ts...> &tuple(void) const noexcept { return Data; }
 
 private:
   std::tuple<Ts...> Data; ///< Stores parsed entries
   size_t SkipRows; ///< The number of rows to skip at the very beginning of the
                    /// file.
   ///< This number only applies on the number of data rows.
   ///< If your file contains a header row and data rows, the skiping
   ///< of the header row is not taken into account.
   HeaderInformation HeaderInfo; ///< If the file contains a header row or not.
-  char Delimeter;               ///< The seperator between the data entries.
+  char Delimiter;               ///< The seperator between the data entries.
   size_t RowNumber;  ///< Current row number, counts all row numbers including
                      /// the header row.
   bool IsHeaderRead; ///< Was the header read or not.
   std::vector<std::string> Header; ///< The content of the header row.
 };
 
 /// Reads a row of CSV data into \c rosa::csv::CSVRow.
 ///
 /// The next line is read from \p Str by calling
 /// \c rosa::csv::CSVRow::readNextRow on \p Data until all lines are
 /// skipped.
 ///
 /// If the function is called for the first time and the file contains
 /// a header than is the header and the first data row read in after the
 /// number of rows that the user wants to skip.
 ///
 /// \tparam Ts type of values to read from the row
 ///
 /// \note The CSV file should contain a line with fields matching \p Ts...
 ///
 /// \param [in,out] Str input stream of a CSV file
 /// \param [in,out] Data object to read the next line into
 ///
 /// \return \p Str after reading one line from it
 template <typename... Ts>
 std::istream &operator>>(std::istream &Str, CSVRow<Ts...> &Data) {
 
   if (Data.HasFileHeader() == HeaderInformation::HasHeader &&
       !Data.IsHeaderReadDone()) {
     Data.readHeader(Str);
   }
 
   while (Data.CurRow() < (Data.SkipNumRows())) {
     Data.readNextRow(Str);
   }
 
   // read the lines after you skipped the number of rows you want to skip
   Data.readNextRow(Str);
 
   return Str;
 }
 
 } // End namespace
 
 /// Provides `InputIterator` features for iterating over a CSV file.
 ///
 /// The iterator parses rows into `std::tuple` values and iterates over the
 /// file row by row.
 ///
 /// \tparam Ts types of values stored in one row of the CSV file
 ///
 /// \note The iterator expects each row to consists of fields matching \p Ts.
 ///
 /// \note The implementation relies on \c rosa::csv::CSVRow, which in turn
 /// relies on \c rosa::csv::CSVRowParser, which is implemented only for
 /// `arithmetic` types -- signed and unsigned integral types and floating-point
 /// types -- and for \c std::string. Those are the valid values for \p Ts
 template <typename... Ts> class CSVIterator {
 public:
   /// \defgroup CSVIteratorTypedefs Typedefs of rosa::csv::CSVIterator
   ///
   /// Standard `typedef`s for iterators.
   ///
   ///@{
   typedef std::input_iterator_tag
       iterator_category;                ///< Category of the iterator.
   typedef std::tuple<Ts...> value_type; ///< Type of values iterated over.
   typedef std::size_t difference_type;  ///< Type to identify distance.
   typedef std::tuple<Ts...> *pointer;   ///< Pointer to the type iterated over.
   typedef std::tuple<Ts...>
       &reference; ///< Reference to the type iterated over.
   ///@}
 
   /// Creates a new instance.
   ///
   /// \param [in,out] S input stream to iterate over
   /// \param          SkipRows the number of rows you want to skip only once at
   /// the beginning of the file.
   ///                 If you have an header in the file, it is supposed to be
   ///                 the first row, and it will be always read out.
   ///                 But after this header the next number of Rows will be
   ///                 skipped.
   /// \param          HeaderInfo is used to know wheter the file contains an
   /// header row or not.
   ///                 The header has to be in the first row.
-  /// \param          Delimeter is the separator between the differnt values of
+  /// \param          Delimiter is the separator between the differnt values of
   /// the csv file.
   CSVIterator(std::istream &S, const size_t SkipRows = 0,
               const HeaderInformation HeaderInfo = HeaderInformation::HasHeader,
-              const char Delimeter = ',')
+              const char Delimiter = ',')
       : Str(S.good() ? &S : nullptr), SkipRows(SkipRows),
-        HeaderInfo(HeaderInfo), Delimeter(Delimeter), Row() {
+        HeaderInfo(HeaderInfo), Delimiter(Delimiter), Row() {
 
     Row.SetSkipRows(SkipRows);
     Row.SetHeaderInfo(HeaderInfo);
-    Row.SetDelimeter(Delimeter);
+    Row.SetDelimiter(Delimiter);
 
     // \c rosa::csv::CSVIterator::Row is initialized empty so the first
     // incrementation here will read the first row.
     ++(*this);
   }
 
   /// Creates an empty new instance.
   CSVIterator(void) noexcept : Str(nullptr) {}
 
   /// Pre-increment operator.
   ///
   /// The implementation reads the next row. If the end of the input stream is
   /// reached, the operator becomes empty and has no further effect.
   ///
   /// \return \p this object after incrementing it.
   CSVIterator &operator++() {
     if (Str) {
       if (!((*Str) >> Row)) {
         Str = nullptr;
       }
     }
     return *this;
   }
 
   /// Post-increment operator.
   ///
   /// The implementation uses the pre-increment operator and returns a copy of
   /// the original state of \p this object.
   ///
   /// \return \p this object before incrementing it.
   CSVIterator operator++(int) {
     CSVIterator Tmp(*this);
     ++(*this);
     return Tmp;
   }
 
   /// Returns a constant reference to the current entry.
   ///
   /// \note Should not dereference the iterator when it is empty.
   ///
   /// \return constant reference to the current entry.
   const std::tuple<Ts...> &operator*(void)const noexcept { return Row.tuple(); }
 
   /// Returns a constant pointer to the current entry.
   ///
   /// \note Should not dereference the iterator when it is empty.
   ///
   /// \return constant pointer to the current entry.
   const std::tuple<Ts...> *operator->(void)const noexcept {
     return &Row.tuple();
   }
 
   /// Tells if \p this object is equal to another one.
   ///
   /// Two \c rosa::csv::CSVReader instances are equal if and only if they are
   /// the same or both are empty.
   ///
   /// \param RHS other object to compare to
   ///
   /// \return whether \p this object is equal with \p RHS
   bool operator==(const CSVIterator &RHS) const noexcept {
     return ((this == &RHS) || ((this->Str == nullptr) && (RHS.Str == nullptr)));
   }
 
   /// Tells if \p this object is not equal to another one.
   ///
   /// \see rosa::csv::CSVReader::operator==
   ///
   /// \param RHS other object to compare to
   ///
   /// \return whether \p this object is not equal with \p RHS.
   bool operator!=(const CSVIterator &RHS) const noexcept {
     return !((*this) == RHS);
   }
 
-  /// Set the delimeter used in the csv file.
-  /// \param Delimeter the character which separates the values in the csv file.
-  // NOTE (Maxi): I had to change "Delimeter" to "_Delimeter" because otherwise:
-  // "warning: C4458: declaration of 'Delimeter' hides class member"
-  inline void setDelimeter(char _Delimeter) noexcept {
-    this->Delimeter = _Delimeter;
+  /// Set the delimiter used in the csv file.
+  /// \param _Delimiter the character which separates the values in the csv file.
+  // NOTE (Maxi): I had to change "Delimiter" to "_Delimiter" because otherwise:
+  // "warning: C4458: declaration of 'Delimiter' hides class member"
+  inline void setDelimiter(char _Delimiter) noexcept {
+    this->Delimiter = _Delimiter;
   }
 
-  /// get the delimeter currently set to separate the values in the csv file.
+  /// get the delimiter currently set to separate the values in the csv file.
   /// \return the current character, which is used to separte teh values in the
   /// csv file.
-  inline char getDelimeter() const noexcept { return this->Delimeter; }
+  inline char getDelimiter() const noexcept { return this->Delimiter; }
 
 private:
   std::istream *Str; ///< Input stream of a CSV file to iterate over.
   size_t SkipRows; ///< Number of Rows to skip only once at the beginning of the
                    /// file.
   HeaderInformation HeaderInfo; ///< does the csv file contain a header or not,
                                 /// if this information is
   ///< not given correclty, the reading of the header would result in
   ///< in an error.
-  char Delimeter;    ///< Delimeter between the entries in the csv file.
+  char Delimiter;    ///< Delimiter between the entries in the csv file.
   CSVRow<Ts...> Row; ///< Content of the current row
 };
 
 } // End namespace csv
 } // End namespace rosa
 
 #endif // ROSA_SUPPORT_CSV_CSVREADER_HPP
diff --git a/include/rosa/support/csv/CSVWriter.hpp b/include/rosa/support/csv/CSVWriter.hpp
index a077e3d..f1cf2ac 100755
--- a/include/rosa/support/csv/CSVWriter.hpp
+++ b/include/rosa/support/csv/CSVWriter.hpp
@@ -1,221 +1,221 @@
 //===-- rosa/support/csv/CSVWriter.hpp --------------------------*- C++ -*-===//
 //
 //                                 The RoSA Framework
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file rosa/support/csv/CSVWriter.hpp
 ///
 /// \authors David Juhasz    (david.juhasz@tuwien.ac.at)
 ///          Edwin Willegger (edwin.willegger@tuwien.ac.at)
 ///
 /// \date 2017-2019
 ///
 /// \brief Facitilities to write CSV files.
 ///
 //===----------------------------------------------------------------------===//
 
 #ifndef ROSA_SUPPORT_CSV_CSVWRITER_HPP
 #define ROSA_SUPPORT_CSV_CSVWRITER_HPP
 
 #include <iostream>
 #include <ostream>
 
 #include <tuple>
 #include <vector>
 #include <array>
 
 #include "rosa/support/log.h"
 
 namespace rosa {
 namespace csv {
 
 /// Provides facilities to write values into a CSV file.
 ///
 /// The writer emits a comma, the character `,`, between each written values.
 /// The resulted stream is a flat CSV file as it consists of onlyone row, no new
 /// line is emitted.
 ///
 /// \tparam T type of values to write
 template <typename T>
 class CSVWriter {
 public:
   /// Creates a new instance.
   ///
   /// \param [in,out] S output stream to write to
   ///
   /// \note The writer operates on non-binary outputs as long as \p S is in
   /// good state.
   CSVWriter(std::ostream &S)
       : Str(S.good() && !(S.flags() & std::ios::binary) ? &S : nullptr),
         IsFirst(true) {}
 
   /// Tells if the last operation was successful.
   ///
   /// \return if the last operation was successful
   bool good(void) const noexcept {
     return Str != nullptr;
   }
 
   /// Writes an entry to the output stream.
   ///
   /// The implementation does anything only if the last operation was
   /// successful. If so, \p V is written to \c rosa::csv::CSVWriter::Str.
   /// The emitted value is preceded with a comma if the actual call is not the
   /// first one for \p this object. Success of the operation is checked at the
   /// end.
   ///
   /// \param V value to write
   void write(const T &V) {
     if (Str) {
       if (!IsFirst) {
         *Str << ',';
       } else {
         IsFirst = false;
       }
       *Str << V;
       if (!Str->good()) {
         Str = nullptr;
       }
     }
   }
 
 private:
   std::ostream *Str; ///< Output stream to write to.
   bool IsFirst;      ///< Denotes if the next write would be the first one.
 };
 
 /// Writes a tuple of values into a CSV file
 ///
 /// \tparam Ts types of values to write
 template <typename... Ts> class CSVTupleWriter {
 
 public:
 
 //    typedef <Ts...> value_type ;  ///< Type of values written.
     typedef std::tuple<Ts...> value_type;
 
     /// Creates a new instance.
     ///
     /// \param [in,out] S output stream to write to
     ///
     /// \note The writer operates on non-binary outputs as long as \p S is in
     /// good state.
     CSVTupleWriter(std::ostream &S)
         : Str(S.good() && !(S.flags() & std::ios::binary) ? &S : nullptr), 
           IsHeaderWritten(false), IsDataWritten(false) {}
 
     /// Tells if the last operation was successful.
     ///
     /// \return if the last operation was successful
     bool good(void) const noexcept {
       return Str != nullptr;
     }
 
 
     /// Write the values of a tuple to a CSV file with \c rosa::csv::CSVTupleWriter.
     ///
     /// \see rosa::csv::CSVTupleWriter
     ///
     /// 
     /// \param [in,out] values tuple, which values are written in a recusive fashion into a stream.
     template<size_t i = 0>
     void write(const std::tuple<Ts...> &values) {
         constexpr size_t size = sizeof...(Ts);
 
         LOG_TRACE_STREAM << "Writing tuple values into file \n"; 
         LOG_TRACE_STREAM << " Tuple has " << std::to_string(size) << " elements. \n";
 
         LOG_TRACE_STREAM << " Value is " << std::get<i>(values);
 
         if(Str){
             /// Write the current element of the tuple into the stream and add a separtor after it, 
             /// and call the function for the next element in the tuple.
             if constexpr(i+1 != sizeof...(Ts)){
                 *Str << std::get<i>(values) << ", ";
                 write<i+1>(values);
             /// If the last element is written into the stream than begin a new line. 
             }else if constexpr(i + 1 == sizeof...(Ts)){
                 *Str << std::get<i>(values) << '\n';
                 /// every time the last data value of a line is written, the flag indicates that data was already written into the file.
                 IsDataWritten = true; 
             }
         }
     }
 
     /// Write the header values to a CSV file with \c rosa::csv::CSVTupleWriter.
     ///
     /// \note The function has no effect if anything has already been written
     /// to the output stream either by \c
     /// rosa::csv::CSVTupleWriter::writeHeader() or \c
     /// rosa::csv::CSVTupleWriter::write().
     ///
     /// \see rosa::csv::CSVTupleWriter
     ///
     /// \param header the content of the header line.
     void writeHeader(const std::array<std::string, sizeof...(Ts)> &header){
         size_t index = 0;
         /// write into the stream only, if it is not a nullptr, and if no data and no header was already written into it. 
         if(Str && IsDataWritten == false && IsHeaderWritten == false){
             index = 0;
             for (auto i = header.begin(); i != header.end(); ++i){
                 index = index + 1;
-                /// write into the stream every entry with a delimeter, in this case ", " until 
+                /// write into the stream every entry with a delimiter, in this case ", " until 
                 /// the last entry
                 if(index != header.size()){
                     *Str << *i << ", ";
-                /// write the last entry into the stream, without any delimeter
+                /// write the last entry into the stream, without any delimiter
                 }else {
                     *Str << *i;
                 }
             }
             /// finish the header line and start a new line.
             *Str << '\n';
             /// now it is not possible to write additional header lines. 
             IsHeaderWritten = true;
         }
     }
 
 private:
     std::ostream *Str;              ///< Output stream to write to.
     bool          IsHeaderWritten;  ///< If an header line was already written into the stream. If set than no additional header could be written.
     bool          IsDataWritten;    ///< If one line of data has already been written into the stream, than no headerline could be added. 
 };
 
 /// Writes all values of a tuple to a CSV file with \c rosa::csv::CSVTupleWriter.
 ///
 /// \see rosa::csv::CSVTupleWriter
 ///
 /// \tparam Ts types of values to write
 ///
 /// \param [in,out] W object to write with
 /// \param V values to write
 ///
 /// \return \p W after writing \p V with it
 template <typename... Ts>
 CSVTupleWriter<Ts...> &operator<<(CSVTupleWriter<Ts...> &W, const std::tuple<Ts...> &V)
 {
     W.write(V);
     return W;
 }
 
 /// Writes a value to a CSV file with \c rosa::csv::CSVWriter.
 ///
 /// \see rosa::csv::CSVWriter
 ///
 /// \tparam T type of value to write
 ///
 /// \param [in,out] W object to write with
 /// \param V value to write
 ///
 /// \return \p W after writing \p V with it
 template <typename T>
 CSVWriter<T> &operator<<(CSVWriter<T> &W, const T& V) {
   W.write(V);
   return W;
 }
 
 } // End namespace csv
 } // End namespace rosa
 
 #endif // ROSA_SUPPORT_CSV_CSVWRITER_HPP